UW03-mics

uw03

UW Course Outline
Microphones

<<<RECORD>>>

London Bridge Studio

A. The Transducer

1. The overall sound of an audio signal will be no better than the “weakest link” in its signal path.

2. The “psychology” of microphone pickups– There is a psychology but there are no rules– The “Good Rule = good musician/source + good instrument + good performance + good acoustics + good mic + good placement = good sound"

B. Microphone Design

Note: Emiliano told us about a link to a booklet on mics from Neumann … Here’s a download link to that booklet

1. Dynamic

– Magnetic Principles of operation

– Whenever metal cuts across a magnetic field, a current (of a specific intensity and direction) is “induced” into the metal… conversely, whenever a current is introduced into metal a magnetic field (of a specific intensity and direction) will be set up.

  • 1957 Cadillac analogy

How Loudspeakers work

2. Ribbon

3. Condenser

  • Q=CV

  • powered condenser

  • electret

3. Microphone characteristics

directionality

  • omni

  • cardioid

  • figure 8 (bi-directional)

– frequency response

– to EQ, or not to EQ… chosing the right mic

– proximity effect

– rumble (p.108)

– transient response

– pop-filtering

▪ wind screen

▪ popper-stoppers (stocking stuffers)

– output characteristics

– sensitivity/noise

– overload capacity

– input trim/padding

– impedance (resistance)

▪ mics are ~200

▪ lines are high Z


– balanced lines

▪ advantages

▪ phantom powering


– unbalanced


Mic Mods & affordable mics

microphone-parts.com

Mic preamps


C. Professional Microphone Techniques Book

1. group discussion – Talk about some of your favorite mics and techniques

D. Microphone Techniques

1. Really, folks, it’s mostly a matter of common sense

– Stick to MRT-9 so as not to go over (pp. 118-148)

2. Working Distances (PP. 125-144)

– distant

– close

– accent

– ambient

– general ideas about “workin the room”

3. Phase Relationships

4. Stereo Techniques

  • XY

  • Blumlein

  • Decca tree

MS

– hardware matrix

– plug-in matrix

5. reamp

– p. 137-138

6. Surround Techniques

– XY

– Blumlein

7. Recording Direct

– DI Box

– Mixing the signals (surround)